Belgian international Lukaku, 21, spent last season on loan at Goodison Park, and completed a £28m move to join up with Roberto Martinez once again on Merseyside on Wednesday night. The decision to sell Lukaku wasn't particularly a surprise, given the alleged friction between the former Anderlecht star and Blues boss Jose Mourinho, as the striking overhaul continues at Stamford Bridge.
We've already seen Demba Ba and Samuel Eto'o leave the club after underwhelming seasons in West London, and Atletico Madrid striker Diego Costa has arrived in a £32m deal, whilst Blues legend Didier Drogba has returned to the club on a free transfer. That leaves just one other striker at Stamford Bridge - Fernando Torres.
The Spaniard has been a monumental failure since his £50m move from Liverpool in January 2011, scoring just 45 goals in 172 games. Having once again struggled to find the form that made him one of the top strikers in Europe during his time at Anfield, 30-year-old Torres has been strongly linked with a move back to Atletico Madrid - the club where he made his name.
However, Lukaku's departure could now hand him one final chance to impress with Chelsea. Torres is one of just three strikers at Mourinho's disposal, and selling him would mean having to find another striker to sign having already brought in two in Costa and Drogba.
Costa only found the net on a regular basis on one season at Atletico, whilst a 36-year-old Drogba is something of an unknown quantity. It's virtually impossible that Torres could ever be what he was; a clinical striker with blistering pace that terrorised defences.
All he can do now is try to prove to Mourinho that he deserves one more chance to contribute for Chelsea - and Lukaku's departure has increased the probability of that exponentially.